Sheet-metal-pipe former.



PATENTED MAY 12, 1903.

s. M; SGHMEETZEE. SHEET METAL PIPE EOEMEE.

APPLICATION FILED FEB. 6. 1902.

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APPLIOATION FILED PEB. 6. 1902.

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NITFD STATES lPatented May i2. 19de.

PATENT OFFICE.

SAMUEL M. SCHMELIZER, OFv CANTON,` OHIO, AssIcNoRjTo THE CANTON MACHINE AND MANUFAOTURINcr COMPANY, O F CANTON, OHIO.

SH x-:ET-METAL- Pl Psi-*ORM ER.

SPECIFICATION forming part' of Letters ratentive. 'rasant/Ys, dated May 12, 1903. `Application filed February 6, 1902. `Serial No. 92,878; (No model.)

To all whoml it may concern:

Be it known that I, SAMUEL M/SCIIMELT- ZER, a citizen of the United States, residing edged, is formed around a` mandrel and the turned edges locked preparatory to beingI grooved; and the object of my improvement is to provide means for completing the forming and locking ofthe turned edges -which can be adapted to various-sized mandrels and pipes. I attain this object by the meehanism illustrated in the accompanying drawings, in which- Y Figure lis a plan view of the entire machine; Fig. 2, a longitudinal vertical section of the same; Fig. 3,'a cross-section on the line 3 3, Fig. 1; Fig. 4, a fragmentary crosssection showing the first operation in the forming; Fig. 5, a similar View showing the second operation; Fig. 6, a similar view showing the forming completed, and Fig.,7 a similar View showing the edges locked.

Similar` numerals refer to similar partsthroughout the -several views.

In the embodiment of my invention as illustrated the frame consists of two similar members l and la, connected by the frame-rods 2. The block-girder 3 is supported by the brackets 4 between the frame members inthe lower part in the middle line; 'Above the blockgirder 3 is located the vertically-movable block-plate 5, the similar end brackets6 of which are guided by the flanges 7 and 7a on the frame members. Connecting the blockgirder and the block-plate are the toggle-levers 8, the respective bars of which are pivoted to the girder belowand the plate above and the common joints to the block-actuatin g bar 9.

The blade-girders 10 and ll are supported on the top of the frame members bythe similar brackets 12, which are movable sidewise toward and from the middle line. Connecting the blade-girders, respectively, and the frame are the toggle-levers 13 and 14, the respective bars of which are pivoted to the outer parts of 'the frame members and the bladegirders, respectively, and thegcommon joints to the blade-actuating bars 15 and 16, respectively.

,The round mandrel l7 'is}'horizontally located in the middle line'and is supported on the frame member l by the bracket 18 and on the frame member l by the grooved ,roller 19.

On. the block-plate 5 is attached theiform- 6o ing-:block M20, which hasj the longitudinal semicir'cular groove 2l inits upper side of slightly larger diameter than the mandrel. On the' innersidejof. the girder 10 is attached the forming-.blade 22, which has its' upper 65 side beveled, so as tofform the sharp projecting edge 23, and on th'ein'ner side of the girder 1l is attached they locking-blade 24, which has its projecting edge 25 blunt or slightly rounded. These blades are prefer- 7o ably made of angle-iron, and the` attaching sides are provided wit-h the slots 26, through which are passed the attaching-bolts 27, thus givingaverticaladjustment. Thelowersides ofthe respective blades are formed flatand horizontal.

The three several cams 34, 35, and 36 are mounted on the cam-shaft 37. The cam. 34 rotates inthe frame 38, which isattached to the block-actuating bar 9., vThe cams 35 and l 8o 36, respectively, rotatel in the frames 39 and 40,. the outer bars 41 and 42, respectively, of which extend upward beyond the top of the machine-frame and also downwardto a pivotal connection in the brackets 43, attached to the lower part of `said machine '-frame member. The upper ends of the cam-frame bars 41 and 42 are respectively attached to the blade-actuating bars 15 and 16 by the compound knuckle-joints 44 and 45. The 9o several cams are similarly formed and are so located on the shaft that they will when rotated throw the respective frames successively outward from the machine-frame and` then successively inward .in the same order. Thus the block toggle-levers 8 and the blade toggle-levers 13 and 14 are operated successively by their respective actuating-bars 9, 15, and 16.

The cam-shaft is mounted in the journalloo bearings 28, which are attached on the Outer side of the frame member 1,- and the pulley-shaft 29 is similarly mounted below the cam-shaft and carries the driving-pulley 30. Power is transmitted by means of the cogpinion 31 on the pulley-shaft and the cogwheel 32 on the cam-shaft. The cog-wheel is mounted on the cam-shaft by the ordinary pin-clutch 33, which is thrown into engagement by the rod 46 and automatically throws out at the end of one revolution.

To form and lock the turned edges of a sheet-metal pipe, the machine being in its normal position, as shown in Figs. 1, 2, and 3, and the sheet metal 47 having been cut to the proper length and width and the edges 48 and 49, respectively, flanged and turned back, the sheet is placed on the forming-block, where it is held in proper alinement by the guides 50 on either side, as shown in Fig. 3. The pin-clutch 33 is then thrown into engagement, and by the rotation of the several cams the work is done as follows: The formingblock 2O is first thrown upward by the toggle-levers 8, its groove 2l bending the sheet metal around the lower half of the mandrel, with the turned edges extending upward, as shown in Fig. 4. The forming-blade 22 is then thrown inward by the toggle-levers 13, bending one side of the sheet metal over the mandrel, the blade being so adjusted vertically and in its lateral movement that its sharp edge 23 engages the angle of the turned edge 48 and its lower fiat side holds the sheet metal immediately above, with the turned edge just beyond the middle line of the mandrel, as shown in Fig. 5. The locking-blade 24 is then thrown inward by the toggle-levers 14, bending the other side ot' the sheet metal over the mandrel, the blade beingso adjusted vertically and in its lateral movement that its lower Hat side will carry the turned edge 49 immediately above and clearing beyond the turned edge 4S, as shown in Fig. (5. The forming-block and the forming-blade are then successively thrown away from the mandrel by the reverse action of their respective toggle-levers, and the turned edge 4S springs up and engages and locks with the turned edge 49, as shown in Fig. 7, after which the locking-blade 24 is thrown away from the mandrel to its normal position, when the machine stops, the cam-shaft having completed its one revolution, which leaves the formed and edgelocked pipe 51 free to be grooved on the mandrel or removed from its free end 52, as may be desired.

By my construction of the forming and locking blades the same can be adapted by vertical adjustment for making various-sized pipes with the correspondingly-sized mandrels and forming-blocks.

I am aware that sheet-metal ware has been formed on a mandrel with a forming-block below and blades operated from the sides above the mandrel, and I do not claim these elements broadly; but I am not aware that such blades have been shaped or operated in the manner and for the purpose I specify; neither do I claim as my invention the particular mechanism illustrated in my drawings for operating the forming blocks and blades.

What I claim as my invention, and desire to secure by Letters Patent, is-

In a sheet-metal-pipe former, the combination of a mandrel, a forming-block below and a sharp-edged formingblade on one side and a locking-blade on the other side above said mandrel, the respective blades being vertically adjustable and having their lower sides substantially flat and horizontal, with means for successively actuating said forming-block upward against the mandrel and the forming and locking blades inward and respectively above and beyond the middle line of the mandrel, and then successively away from said mandrel, substantially as and for the purpose specified.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

SAMUEL M. SCHMELTZER.

Witnesses:

J. I-I. WEIDMAN, HARRY FREASE. 

